For active Lyme infection to occur in dog or man, B. burgdorferi requires an intermediate host; that is, the disease cannot be directly transmitted from one host to another through contact with infected body secretions such as blood, saliva, urine, etc.是什么意思_For active Lyme infection to occur in dog or man, B. burgdorferi requires an intermediate host; that is, the disease cannot be directly transmitted from one host to another through contact with infected body secretions such as blood, saliva, urine, etc.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句